From Proto-Indo-Iranian *tráyas, from Proto-Indo-European *tréyes.
*θráyah (stem *θri-)
- three
- Central Iranian:
- Avestan: 𐬚𐬭𐬌 (θri), 𐬚𐬭𐬁𐬌𐬌𐬋 (θrāiiō, nom. pl.)
- Northeastern Iranian:
- Ossetian: ӕртӕ (ærtæ)
- Khotanese: 𑀤𑁆𑀭𑁆𑀐 (drai)
- Sogdo-Bactrian:
- Bactrian: υαϱηιο (/*harēi̤(o)/)
- Khwarezmian: شی (šy /šē/)
- Proto-Sogdic:
- Sogdian: (/(ə)θrē,šē/)
- Manichaean script: 𐫀𐫔𐫡𐫏 (ʾδry)
- Sogdian script: [script needed] (ʾδry), [script needed] (δry)
- Syriac script: ܐܠܪܝ (ʾδry), ܫܝ (šy)
- Yagnobi: тирай (tiray), сарай (saray)
- Southeastern Iranian:
- Ormuri: ښری (ṣ̌rī)
- Pashto: درې (dre)
- Northwestern Iranian:
- Baluchi: سی (say)
- Kurdish:
- Central Kurdish: سێ (sê)
- Northern Kurdish: sê, sisê
- Southern Kurdish: سێ (sê)
- Laki: سِ (si)
- Proto-Medo-Parthian:
- Mazanderani: سه (se)
- Parthian: (/hrē/)
- Manichaean script: 𐫍𐫡𐫏 (hry)
- Inscriptional Parthian script: 𐭕𐭋𐭕𐭀 (tltʾ), 𐭚 (3)
- Old Tati:
- Harzani: هره (here)
- Karingani: هری (herī)
- Proto-Zaza-Gorani:
- Southwestern Iranian:
- Old Persian: 𐏂 (ç /çi-/)
- Middle Persian: (/sē/)
- Manichaean script: 𐫘𐫆 (sẖ)
- Book Pahlavi script: [Book Pahlavi needed] (TLTA)
- Inscriptional Pahlavi script: 𐭲𐭫𐭲𐭠 (TLTA), 𐭺 (3)
- Lurish:
- Northern Luri: سئ (se)
- Classical Persian: سه (sē)
- Dari: سه (sē)
- Iranian Persian: سه (se)
- Tajik: се (se)
